linux-kernel - Re: [PATCH v5 15/22] media: rzg2l-cru: Make use of v4l2_format

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Message-ID: <20241015103317.GJ5682@pendragon.ideasonboard.com>
Date: Tue, 15 Oct 2024 13:33:17 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v5 15/22] media: rzg2l-cru: Make use of
 v4l2_format_info() helpers

Hi Prabhakar,

Thank you for the patch.

On Fri, Oct 11, 2024 at 06:30:45PM +0100, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> Make use of v4l2_format_info() helpers to determine the input and
> output formats.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
>  .../platform/renesas/rzg2l-cru/rzg2l-video.c  | 22 ++++++-------------
>  1 file changed, 7 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> index 8932fab7c656..0cc69a7440bf 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-video.c
> @@ -300,21 +300,12 @@ static void rzg2l_cru_initialize_axi(struct rzg2l_cru_dev *cru)
>  	rzg2l_cru_write(cru, AMnAXIATTR, amnaxiattr);
>  }
>  
> -static void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru, bool *input_is_yuv,
> +static void rzg2l_cru_csi2_setup(struct rzg2l_cru_dev *cru,
>  				 const struct rzg2l_cru_ip_format *ip_fmt,
>  				 u8 csi_vc)
>  {
>  	u32 icnmc = ICnMC_INF(ip_fmt->datatype);
>  
> -	switch (ip_fmt->code) {
> -	case MEDIA_BUS_FMT_UYVY8_1X16:
> -		*input_is_yuv = true;
> -		break;
> -	default:
> -		*input_is_yuv = false;
> -		break;
> -	}
> -
>  	icnmc |= (rzg2l_cru_read(cru, ICnMC) & ~ICnMC_INF_MASK);
>  
>  	/* Set virtual channel CSI2 */
> @@ -327,19 +318,17 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
>  					   struct v4l2_mbus_framefmt *ip_sd_fmt,
>  					   u8 csi_vc)
>  {
> +	const struct v4l2_format_info *src_finfo, *dst_finfo;
>  	const struct rzg2l_cru_ip_format *cru_ip_fmt;
> -	bool output_is_yuv = false;
> -	bool input_is_yuv = false;
>  	u32 icndmr;
>  
>  	cru_ip_fmt = rzg2l_cru_ip_code_to_fmt(ip_sd_fmt->code);
> -	rzg2l_cru_csi2_setup(cru, &input_is_yuv, cru_ip_fmt, csi_vc);
> +	rzg2l_cru_csi2_setup(cru, cru_ip_fmt, csi_vc);
>  
>  	/* Output format */
>  	switch (cru->format.pixelformat) {
>  	case V4L2_PIX_FMT_UYVY:
>  		icndmr = ICnDMR_YCMODE_UYVY;
> -		output_is_yuv = true;
>  		break;
>  	default:
>  		dev_err(cru->dev, "Invalid pixelformat (0x%x)\n",
> @@ -347,8 +336,11 @@ static int rzg2l_cru_initialize_image_conv(struct rzg2l_cru_dev *cru,
>  		return -EINVAL;
>  	}
>  
> +	src_finfo = v4l2_format_info(cru_ip_fmt->format);
> +	dst_finfo = v4l2_format_info(cru->format.pixelformat);

It would be a bit more efficient to add a yuv boolean field to the
rzg2l_cru_ip_format structure, as you already have looked up cru_ip_fmt
for the IP subdev format.

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>

> +
>  	/* If input and output use same colorspace, do bypass mode */
> -	if (output_is_yuv == input_is_yuv)
> +	if (v4l2_is_format_yuv(src_finfo) == v4l2_is_format_yuv(dst_finfo))
>  		rzg2l_cru_write(cru, ICnMC,
>  				rzg2l_cru_read(cru, ICnMC) | ICnMC_CSCTHR);
>  	else

-- 
Regards,

Laurent Pinchart